10ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// 20ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// detail/reactive_socket_recvfrom_op.hpp 30ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 40ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// 50ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) 60ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// 70ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// Distributed under the Boost Software License, Version 1.0. (See accompanying 80ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 90ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// 100ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 110ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#ifndef ASIO_DETAIL_REACTIVE_SOCKET_RECVFROM_OP_HPP 120ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#define ASIO_DETAIL_REACTIVE_SOCKET_RECVFROM_OP_HPP 130ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 140ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 150ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/config.hpp" 160ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/addressof.hpp" 170ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/bind_handler.hpp" 180ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/buffer_sequence_adapter.hpp" 190ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/fenced_block.hpp" 200ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/reactor_op.hpp" 210ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/socket_ops.hpp" 220ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 230ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/push_options.hpp" 240ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 250ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffienamespace asio { 260ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffienamespace detail { 270ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 280ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffietemplate <typename MutableBufferSequence, typename Endpoint> 290ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffieclass reactive_socket_recvfrom_op_base : public reactor_op 300ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie{ 310ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffiepublic: 320ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie reactive_socket_recvfrom_op_base(socket_type socket, int protocol_type, 330ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie const MutableBufferSequence& buffers, Endpoint& endpoint, 340ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie socket_base::message_flags flags, func_type complete_func) 350ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie : reactor_op(&reactive_socket_recvfrom_op_base::do_perform, complete_func), 360ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie socket_(socket), 370ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie protocol_type_(protocol_type), 380ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie buffers_(buffers), 390ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie sender_endpoint_(endpoint), 400ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie flags_(flags) 410ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie { 420ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie } 430ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 440ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie static bool do_perform(reactor_op* base) 450ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie { 460ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie reactive_socket_recvfrom_op_base* o( 470ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie static_cast<reactive_socket_recvfrom_op_base*>(base)); 480ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 490ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie buffer_sequence_adapter<asio::mutable_buffer, 500ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie MutableBufferSequence> bufs(o->buffers_); 510ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 520ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie std::size_t addr_len = o->sender_endpoint_.capacity(); 530ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie bool result = socket_ops::non_blocking_recvfrom(o->socket_, 540ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie bufs.buffers(), bufs.count(), o->flags_, 550ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie o->sender_endpoint_.data(), &addr_len, 560ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie o->ec_, o->bytes_transferred_); 570ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 580ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie if (result && !o->ec_) 590ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie o->sender_endpoint_.resize(addr_len); 600ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 610ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie return result; 620ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie } 630ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 640ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffieprivate: 650ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie socket_type socket_; 660ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie int protocol_type_; 670ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie MutableBufferSequence buffers_; 680ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie Endpoint& sender_endpoint_; 690ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie socket_base::message_flags flags_; 700ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie}; 710ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 720ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffietemplate <typename MutableBufferSequence, typename Endpoint, typename Handler> 730ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffieclass reactive_socket_recvfrom_op : 740ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie public reactive_socket_recvfrom_op_base<MutableBufferSequence, Endpoint> 750ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie{ 760ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffiepublic: 770ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ASIO_DEFINE_HANDLER_PTR(reactive_socket_recvfrom_op); 780ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 790ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie reactive_socket_recvfrom_op(socket_type socket, int protocol_type, 800ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie const MutableBufferSequence& buffers, Endpoint& endpoint, 810ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie socket_base::message_flags flags, Handler& handler) 820ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie : reactive_socket_recvfrom_op_base<MutableBufferSequence, Endpoint>( 830ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie socket, protocol_type, buffers, endpoint, flags, 840ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie &reactive_socket_recvfrom_op::do_complete), 850ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie handler_(ASIO_MOVE_CAST(Handler)(handler)) 860ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie { 870ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie } 880ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 890ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie static void do_complete(io_service_impl* owner, operation* base, 900ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie const asio::error_code& /*ec*/, 910ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie std::size_t /*bytes_transferred*/) 920ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie { 930ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // Take ownership of the handler object. 940ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie reactive_socket_recvfrom_op* o( 950ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie static_cast<reactive_socket_recvfrom_op*>(base)); 960ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ptr p = { asio::detail::addressof(o->handler_), o, o }; 970ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 980ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ASIO_HANDLER_COMPLETION((o)); 990ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 1000ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // Make a copy of the handler so that the memory can be deallocated before 1010ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // the upcall is made. Even if we're not about to make an upcall, a 1020ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // sub-object of the handler may be the true owner of the memory associated 1030ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // with the handler. Consequently, a local copy of the handler is required 1040ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // to ensure that any owning sub-object remains valid until after we have 1050ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // deallocated the memory here. 1060ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie detail::binder2<Handler, asio::error_code, std::size_t> 1070ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie handler(o->handler_, o->ec_, o->bytes_transferred_); 1080ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie p.h = asio::detail::addressof(handler.handler_); 1090ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie p.reset(); 1100ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 1110ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // Make the upcall if required. 1120ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie if (owner) 1130ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie { 1140ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie fenced_block b(fenced_block::half); 1150ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); 1160ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie asio_handler_invoke_helpers::invoke(handler, handler.handler_); 1170ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ASIO_HANDLER_INVOCATION_END; 1180ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie } 1190ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie } 1200ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 1210ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffieprivate: 1220ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie Handler handler_; 1230ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie}; 1240ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 1250ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie} // namespace detail 1260ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie} // namespace asio 1270ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 1280ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/pop_options.hpp" 1290ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 1300ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#endif // ASIO_DETAIL_REACTIVE_SOCKET_RECVFROM_OP_HPP 131